Common Digester jar problem

I am using Tomcat 4.1 now. Recently, i have developed a jasperreport program that require common-digester jar to run the program. I found that common-digester.jar is not available in the common\lib folder under the Apache folder. So i download a common-digester.jar file from Apache site and put in. But it cause my Apache startup fail to run as usual. After i remove the jar file, it will work fine.
I have tried a few version of common-digester.jar file, but it seems doesn't work.
Please help me..........

Don't put the digester jar in any of Tomcat's lib directories. For one thing, Tomcat already has its own copy and you can end up with problems. Put the digester jar in the webapp WAR's WEB-INF/lib directory.

Tomcat 4.1 is long past end of life, however, and no longer supported. You need to consider moving to a newer version of Tomcat.

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